Clathrin- and caveolin-1-independent endocytosis: entry of simian virus 40 into cells devoid of caveolae.

Clathrin- and caveolin-1-independent endocytosis: entry of simian virus 40 into cells devoid of caveolae.
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网格蛋白和小窝蛋白-1独立的内吞作用:将猿猴病毒40进入没有小窝的细胞中。

DOI:
10.1083/jcb.200407113
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发表时间:
2005-01-31
期刊:
The Journal of cell biology
影响因子:
--
通讯作者:
Helenius A
Helenius A
中科院分区:
其他
文献类型:
--
作者:
Damm EM;Pelkmans L;Kartenbeck J;Mezzacasa A;Kurzchalia T;Helenius A

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猴病毒40(SV 40)已被证明通过小窝内吞进入宿主细胞,然后通过小窝体转运到内质网(ER)。使用caveolin-1(cav-1)缺陷细胞系(人肝癌7)和cav-1基因敲除小鼠的胚胎成纤维细胞,我们发现,在没有caveolae的情况下,而且在野生型胚胎成纤维细胞中,病毒利用了另一种cav-1独立的途径。内化是快速的(t1/2 = 20分钟)和胆固醇和酪氨酸激酶依赖性,但独立的网格蛋白,发动蛋白II,和ARF 6。这些病毒被内化在小的、紧密贴合的囊泡中,并被转运到类似于囊泡体但没有cav-1和-2的膜结合的、pH中性的细胞器中。病毒随后通过微管依赖性囊泡运输转移到ER,这是感染性所需的步骤。我们的研究结果表明,存在一个病毒激活的内吞途径,从质膜到ER,既不涉及网格蛋白也不小窝,也可以激活cav-1的存在。
Simian Virus 40 (SV40) has been shown to enter host cells by caveolar endocytosis followed by transport via caveosomes to the endoplasmic reticulum (ER). Using a caveolin-1 (cav-1)–deficient cell line (human hepatoma 7) and embryonic fibroblasts from a cav-1 knockout mouse, we found that in the absence of caveolae, but also in wild-type embryonic fibroblasts, the virus exploits an alternative, cav-1–independent pathway. Internalization was rapid (t 1/2 = 20 min) and cholesterol and tyrosine kinase dependent but independent of clathrin, dynamin II, and ARF6. The viruses were internalized in small, tight-fitting vesicles and transported to membrane-bounded, pH-neutral organelles similar to caveosomes but devoid of cav-1 and -2. The viruses were next transferred by microtubule-dependent vesicular transport to the ER, a step that was required for infectivity. Our results revealed the existence of a virus-activated endocytic pathway from the plasma membrane to the ER that involves neither clathrin nor caveolae and that can be activated also in the presence of cav-1.
DOI: 10.1083/jcb.200302028
发表时间: 2003-05-26
期刊: The Journal of cell biology
影响因子: --
作者:
Nabi IR;Le PU
通讯作者: Le PU
DOI: 10.1073/pnas.92.19.8655
发表时间: 1995-09-12
影响因子: 11.1
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发表时间: 2002-05-01
影响因子: 21.3
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通讯作者: Nichols, BJ
邻胞病毒40进入内质网中的内吞作用。
DOI: 10.1083/jcb.109.6.2721
发表时间: 1989-12
影响因子: 7.8
作者:
Kartenbeck, J;Stukenbrok, H;Helenius, A
通讯作者: Helenius, A
DOI: 10.1126/science.1062688
发表时间: 2001-09-28
期刊: SCIENCE
影响因子: 56.9
作者:
Drab, M;Verkade, P;Kurzchalia, TV
通讯作者: Kurzchalia, TV